[Nouveau] [Bug 24820] [nv15] Vertical screen corruption in X when KMS is enabled

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=24820





--- Comment #27 from Johannes Obermayr <johannesobermayr at gmx.de>  2009-11-28 07:11:18 PST ---
(In reply to comment #26)
> It seems your FIFOs are underflowing because of some unknown source of latency.
> If you have applied the patch series I sent to the mailing list,
> nouveau_calc.c:191 will read:
> 
> >         fifo->lwm = min_lwm + 5 * (max_lwm - min_lwm) / 100; /* Empirical. */
> 
> That "5" is enough for all the cards I have, but you'll need a higher value,
> probably something within [5,40] (don't bother to find a very accurate lower
> bound, a +/-5 estimate would be fine).
> 

"10" works for me...

Thanks again for your work and patience...


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